All4Cellular offers the HMDX Portable Speaker-On-The-Go in Black, Blue, or Pink for $5.95. Coupon code "A4C5A6" drops it to $5.65. With $2 for shipping, that's $2 under our mention from two weeks ago and the lowest total price we could find, also by $2. It features an inner mesh pocket for your device, zipper closure, and compatibility with any smartphone or MP3 player that has a 3.5mm headphone port. It requires two AA batteries (not included).